from my_pack.a1 import a1_max
from my_pack.a2 import a2_cj

from my_pack.a3 import a3_show
#作用：
# 1、可以控制要引入的东西
# 2、导入包时看着比较整洁

__all__=["a1_max","a2_cj","a3_show"]











